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Finding the Fourth Proportional to 667,458.48, 920,354.76 and 425,357.76

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Solution

The fourth proportional to 667,458.48, 920,354.76 and 425,357.76 is: 586,523.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,458.48 : 920,354.76 = 425,357.76 : x
  2. Step 2: Convert to fraction form
    667,458.48/920,354.76 = 425,357.76/x
  3. Step 3: Cross multiply
    667,458.48x = 920,354.76 × 425,357.76
  4. Step 4: Simplify right side
    667,458.48x = 391,480,039,118.94
  5. Step 5: Solve for x
    x = 391,480,039,118.94/667,458.48
  6. Step 6: Final answer
    x = 586,523.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.